I have recently moved into a new property and we have been informed that due to the construction we can not have cavity wall insulation. I decided to remove existing plaster boards on the internal walls and build a wooden frame,install kingspan/celotex and then refit new plaster boards.I have been told by a friend that i need to fit a membrane to avoid any damp issues. If this is the case how do i fit a membrane and do i need to allow somewhere for any collected water to drain to?

keatzo,
Once you have exposed an area of the internal leaf of your outside wall you should get a surveyor (your local building inspector may help for a fee) in to advise you on the type of construction which will be suitable. If you don't get it right you are likely to get condensation within the structure.
end

in 1992 the then Government brought out a new British Standard, that recommended that buildings in the west of the UK, that are subject to driving rain should not have cavity wall insulation.
Depending on where you are, that may be of interest.
I wonder why your home was plaster boarded, was there damp?
If there was/is has it been cured?

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